臺灣博碩士論文加值系統

自GPS系統開放至民用市場之後，蓬勃發展的GPS導航裝置及智慧型手機，為人們的生活帶來許多便利，飛機、船舶不再容易迷失方向，開車出門時也不需要經常查看地圖，不斷改良的演算法及輔助感測器，大大增加了GPS的定位精度達到誤差僅數公尺的程度，但是其作用範圍卻無法延伸至室內，所以需要銜接另一個系統，提供使用者在龐大建築物內建立方向。
許多單位開始發展室內定位系統，以彌補GPS訊號無法到達的地帶，而其中高亮度白光LED，因其反應速度快且容易數位控制的特性，除了照明用途外，還可以成為數位光訊號的傳輸工具，成為極具可行性的室內定位系統架構。
本論文實作了一個完整的白光LED光訊號收發裝置，並且使用嵌入式系統利用此資訊與網路上的位置資料庫做連結應用，達到低成本、高覆蓋率的室內定位系統。

Since GPS system is released to market, booming GPS navigation devices such as smart phones, bring a lot of convenience to people's lives. Aircraft, vessels are no longer to get lost, and you don’t need to check maps again and again when you are driving. Algorithms and sensors are continuous improved, it greatly increasing the accuracy of GPS positioning reach few meters, but GPS system cannot work in the building. So you need another system to guide people in the big building.
Many units have started to develop an indoor positioning system to link up the area GPS signals cannot reach. The high-brightness white LED is one of solutions, because of its fast response and digital controllable. In addition to lighting purposes, it can be a digital optical signal transmission tool for highly feasible indoor positioning system.
This paper implements a white LED light signal transceiver device, and use the embedded system take this information to link location database on the network. Become a low-cost, high coverage indoor positioning system.

摘 要 IV
ABSTRACT V
表目錄 IX
圖目錄 X

第一章 緒論 1
1.1 研究動機 1
1.2 研究方法 4
1.3 論文架構 5
第二章 室內定位技術 6
2.1 室內定位系統介紹 6
2.2 Wi-Fi 6
2.3 RFID 8
2.4 Bluetooth 9
2.5 可見光通訊(Visible Light Communication, VLC) 10
第三章 定位方法 12
3.1 概論 12
3.2 到達時間法(Time of arrival, TOA) 12
3.3 訊號強度法(Received signal Strength, RSS) 13
3.4 收訊角度法(Angle of Arrival, AOA) 13
3.5 Cell ID法(Cell Identification) 14
3.6 適用於VLC的定位方式 15
第四章 實驗平台與系統規畫 18
4.1 系統架構 18
4.2 Raspberry Pi嵌入式系統平台 18
4.3 嵌入式Linux系統 20
4.4 STM8單晶片處理器 20
4.5 訊號發射電路 21
4.6 訊號接收電路 24
4.7 干擾改善 29
4.8 訊號編碼方式 32
4.9 實際運作狀況 35
第五章 結論 39
參考文獻 40

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